Burner for petrol air-gas



G. H. NELSON AND H. E. SMITH.

BURNER FOR PETROL AIR-GAS.

APPLICATION FILED MAR. I9. I921.

L M 7 M Wrap TA S" P T OFFICE- I Gmaqnaoaa aam aimnesm: ELwEnI. SMITH, or Lennon; ENGLAND.

gems Ion PEirRo sm-Glis.

To all whom it may concern:

Be it known that we, GEORGE HORATIO NELSON and Human ELWELL SMITH, both subjects of the King of Great Britain, reiding in London, England, have jointly 1nvented certain new and useful Improvements Relating to Burners for Petrol Air- Gas, (for which I have filed an application in Great Britain, dated Dec. 3, 1919, Serial No. 30,241,) of which the following is a specification.

The invention relates to burners for petrol air gas appliances for heating and cooking purposes.

It is known to apply wire gauze to the burners, so that the flow of gas may be uniform at all part of the burner to prevent a back-fire, but in these known arran ements the flow of gas has usually been at right angles to the plane of the gauze sheet or sheets,

- and it is found in practice that it is difiicult in these arrangements to maintain a small flame alight especially with weak mixtures.

It is also known to cause the gas to fiow between thin metal plates slightly separated from one another, but with these devices it is difiicult to adjust the distance apart of the plates so as to maintain a steady flame at different pressures, which at higher pressures tends to leave the burner.

It has also been proposed to employ a plug of wire gauze inserted in the axis of a tubular burner, in which case the gas flows axially along the burner and between the parallel layers of the wire gauze.

According to the invention, the layers of wire gauze are inserted in a burner of circular cross section so that the flow of gas is substantially parallel to the planes of the layers of wire gauze and these planes are radially dispose with respect to the circular cross section of the burner.

Thi arrangement enables the gas outlet to be conveniently controlled by adjusting the pressure applied to the layers.

The burner ma be made in man difi'erent forms, examp es of which provi ed with wire gauze according to the invention are shown in the accompanyin drawings.

Figure l is a Ian and ig. 2 a section on the line 2-2 of ig. 1 of a burner head comprising a shallow cylindrical vessel A on the upper wall a of which are placed annular layers B of wire gauze held in position by a cover C which can be screwed down by a central support D screw-threaded into the 1 specification of Letters Ba tent. Patented July 19, 1921.

E i Amiummn mea March 19,:1921.-Scrial:No. 453,852.

base and into the cover. A bafiie plate E of fine wire gauze may be provided within the vessel to effect a more uniform distribution of the gas entering the burner through the pipe F.

Figs. 3 and 4 show respectively in sectional elevation and cross section a burner head in the form of a tube G with a narrow longitudinal aperture at the upper part for the escape of the gas. Thi a erture is fitted with a strip of wire gauze folded up so that the several layers or several separate strips clamped together are inserted in the aperture.

Fig. 5 is a plan and Fig. 6 a section on a larger scale and on the line 6-6 of Fig. 5 of a modified form of tubular burner in which the gauze strips H are at right angles to the central radius passing through the aperture and a flat plate I compresses the layers and causes the gas to escape at the circumference of the aperture.

In the cup shaped burner M shown in Fig. 7 the gas escapes through strips N of gauze placed similarly to those shown in Figs. 2 and 6. A flat plate 0 holds the strips in position by pressure controlled by a screw which is secured to a perforated plate Q screw threaded into the interior of the vessel M.

In any of these forms the surface of the wire gauze may be surrounded or covered by a sheet of fine Wire gauze such as is shown at Z) in Figs. 2 and 7.

Having thus described the nature of the said invention and the best means we know of carrying the same into practical effect, we claim 1. A burner of circular cross section for petrol air gas, an outlet therefrom, layers of wire gauze filling said outlet and so arranged that the flow of gas is substantially parallel to the planes of the layers, which are radial to the cross section of the burner.

2. A burner of circular cross section for petrol air gas, an outlet therefrom, layers of wire gauze filling said outlet and so arranged that the flow of gas is substantially parallel to the planes of the layers, and means for compressing the layers.

3. A burner of circular cross section for petrol air gas, an outlet therefrom, layers of Wire gauze filling said outlet and so arranged that the fiow of gas is substantially parallel to the planes of the layers, a cover on said layers of wire gauze, a screw sesoured to the interior of the burner, and plate screw threaded into the interior of the threaded into the center of said cover. burner, a, screw secured to said plate and 10 4; A burner of circular cross section for threaded into the center of said cover.

petrol air gas, an outlet therefrom, layers of In testimony whereof we have signed our Wire gauze filling said outlet and so arnames to this specification.

' ranged that the flow of gas is substantially parallel to the planes'of the layers, a cover G. H. NELSON.

v on said layers of wire gauze, a perforated HUBERT ELWELL SMITH. 

